Ruby on Rails Rails generate commands Rails Generate Migration
Example
You can generate a rails migration file from the terminal using the following command:
rails generate migration NAME [field[:type][:index] field[:type][:index]] [options]
For a list of all the options supported by the command, you could run the command without any arguments as in rails generate migration.
For example, if you want to add first_name and last_name fields to users table, you can do:
rails generate migration AddNamesToUsers last_name:string first_name:string
Rails will create the following migration file:
class AddNamesToUsers < ActiveRecord::Migration[5.0]
def change
add_column :users, :last_name, :string
add_column :users, :first_name, :string
end
end
Now, apply the pending migrations to the database by running the following in the terminal:
5.0
rake db:migrate
5.0
rails db:migrate
Note: For even less typing, you can replace
generatewithg.
